Answer:
A. The force exerted by the sprinter must be 9.6 × 10² N.
B. The force that propels the sprinter is exerted by the blocks.
Explanation:
Hi there!
Let´s begin with part B:
The sprinter exerts a force on the blocks and, as a reaction, the blocks exert a force on the sprinter that is of equal magnitude but opposite direction (Newton´s third law). This reaction of the blocks causes the acceleration of the sprinter.
Part A
The force exerted by the blocks can be calculated using Newton´s second law:
F = m · a
Where:
F = exerted force.
m = mass of the object being accelerated.
a = acceleration of the object after applying the force on the object.
F = m · a
F = 64 kg · 15 m/s²
F = 9.6 × 10² N
Answer:
Explanation:
According to the described situation we have the following data:
Horizontal distance between lily pads:
Ferdinand's initial velocity:
Time it takes a jump:
We need to find the angle at which Ferdinand jumps.
In order to do this, we first have to find the <u>horizontal component (or x-component)</u> of this initial velocity. Since we are dealing with parabolic movement, where velocity has x-component and y-component, and in this case we will choose the x-component to find the angle:
(1)
(2)
(3)
On the other hand, the x-component of the velocity is expressed as:
(4)
Substituting (3) in (4):
(5)
Clearing :
This is the angle at which Ferdinand the frog jumps between lily pads
Answer:
Explanation:
Displacement is minimum distance between initial and final point .
Distance is total length of path covered in a journey .
a )
Tyler covered a longer distance in the journey because total length of path covered by him is longer due to curved path .
b )
Both have same displacement , because minimum distance between initial and final point in both the case is same .
c )
average speed = distance / time
as time is same for both the case ,
average speed ∝ distance
As distance covered by Tyler is more , his average speed is more .
d )
average velocity = displacement / time
As both displacement and time are same in both the case , average velocity in both the case is same .
e )
They start at the same time and place at the bottom of the mountain and finish at the same time , both have tie and nobody won the race , in spite of speed of Tyler being greater .
<u>Given data:</u>
Voltage (V) = 120 V,
Power (P) = 50.4 Watts,
current flowing (I) = ?
Power is nothing but the rate of doing work. Hence W/t represents electric Power (P).
Electric Power (P) = V.I Watts
This equation can be used to calculate the power consumption by any electrical device that is connected in a circuit.
In the given question, we need to determine the Current flowing through the circuit(bulb).
From the equation,
P = V.I Watts
50.4 = 120 × I
I = 50.4/120
I = 0.42 Amp
<em>Current flowing through the circuit is 0.42 Amperes. </em>
The statement that indicate the examples of resource depletion that can occur due to technology is option B which is Certain chemicals are released into the air by cars, leading to acid rain.
<h3>What is resource depletion?</h3>
Resources depletion is the process in which resources or raw materials are been destroyed or been exhausted due to several human activities or technologies thereby by leading to harmful effects on the health and livelihood of humans.
Therefore, The statement that indicate the examples of resource depletion that can occur due to technology is option B which is Certain chemicals are released into the air by cars, leading to acid rain.
Learn more about resource depletion below.
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